147 lines
4.1 KiB
C++
147 lines
4.1 KiB
C++
#include <stdio.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <malloc.h>
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#include <Windows.h>
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#include <MMSystem.h>
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#include "binary.h"
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int notes[37] = { 134, 142, 150, 159, 169, 179, 189, 201, 213, 225, 239, 253, 268, 284, 301, 319, 338, 358, 379, 401, 425, 451, 477, 506, 536, 568, 601, 637, 675, 715, 758, 803, 851, 901, 955, 1011, 1072 };
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int arpeggio[][4] = {
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{ 12, 15, 19, 24 },
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{ 15, 19, 22, 27 },
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{ 10, 14, 17, 22 },
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{ 8, 12, 15, 20 },
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{ 12, 15, 17, 22 },
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{ 12, 15, 17, 21 },
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{ 17, 20, 24, 29 },
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{ 14, 17, 22, 26 },
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// { 0, 2, 4, 7 },
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// { 0, 2, 4, 6 },
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// { 0, 2, 5, 9 },
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// { 0, 2, 5, 8 },
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};
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int arpseq[48] = {
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0, 0, 1, 2, 0, 0, 6, 2,
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0, 0, 1, 2, 0, 0, 1, 7,
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0, 0, 1, 2, 0, 0, 6, 2,
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0, 0, 1, 2, 0, 0, 1, 2,
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3, 3, 2, 2, 0, 0, 4, 5,
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3, 3, 2, 2, 0, 0, 1, 2,
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};
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//int arptiming[32] = { 4, 2, 4, 2, 4, 2, 4, 5, 1, 2, 2 }
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const uint32_t arptiming = B32(00001100,00110000,11111011,00001100);
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int bassbeat[8] = { 0, 0, 1, 0, 0, 1, 0, 1 };
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int bassline[48] = {
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12, 12, 15, 10, 12, 12, 17, 10, 12, 12, 15, 7, 8, 8, 3, 7,
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12, 12, 15, 10, 12, 12, 17, 10, 12, 12, 15, 7, 8, 8, 3, 7,
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8, 8, 10, 10, 12, 12, 5, 5, 8, 8, 10, 10, 12, 12, 15, 10
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};
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#define LEADSIZE 56
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int leadmelody[LEADSIZE] = {
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// 12, 7, 0, 12, 0, 14, 15, 0, 14, 0, 12, 0, 14, 15, 0, 14, 0, 12, 0, 14, 10, 0, 7, 5, 7, 3, 1, 0,
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// 12, 7, 0, 12, 0, 14, 15, 0, 14, 0, 12, 0, 14, 15, 0, 14, 0, 15, 0, 17, 19, 0, 22, 24, 26, 27, 24, 0,
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8, 3, 0, 8, 10, 12, 14, 15, 19, 17, 0, 12, 7, 0, 12, 14, 15
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};
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int leadtiming[LEADSIZE] = {
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// 2, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 2, 1, 2, 2, 1, 2, 3, 28,
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// 2, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 2, 1, 2, 2, 1, 2, 3, 28,
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2, 1, 1, 2, 1, 3, 2, 2, 1, 3, 14,
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};
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static inline unsigned char voice_lead(unsigned long i)
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{
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static uint8_t leadptr = 0xFF;
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static uint16_t lead_osc = 0;
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static uint16_t lead_flange = 0;
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static uint8_t leadtimer = 1;
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if (0 == (i & 0x3FF))
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leadtimer--;
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if (0 == leadtimer)
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{
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leadptr++;
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if (leadptr == LEADSIZE)
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leadptr = 0;
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leadtimer = leadtiming[leadptr];
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}
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uint8_t melody = leadmelody[leadptr];
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int note = notes[melody == 1 ? 0 : melody]; // TODO remove this hack by using note table
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lead_osc += note;
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lead_flange += note + (i & 1);
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return (!melody) ? 0 : (((lead_osc >> 6) & 0x7F) + (((lead_osc >> 6) & 0x3F) + ((lead_flange >> 6) & 0x3F))); // xor also sounds cool
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}
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static inline unsigned char voice_arp(unsigned long i)
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{
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static uint16_t arp_osc = 0;
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int note = notes[arpeggio[arpseq[(i >> 13) % 48]][(i >> 7) & 3]];
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arp_osc += note;
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return ((arptiming & (1 << (31 - (i >> 9)))) && (arp_osc & (1 << 12))) ? 0 : 140;
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//return ((arp_osc >> 5) & 128) - 1;
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}
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static inline unsigned char voice_bass(unsigned long i)
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{
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static uint16_t bassosc = 0, flangeosc = 0;
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int note = notes[bassline[(i >> 13) % 48]];
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if (bassbeat[(i >> 10) & 7])
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note <<= 1;
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bassosc += note;
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flangeosc += note + 1;
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unsigned char ret = ((bassosc >> 8) & 0x7F) + ((flangeosc >> 8) & 0x7F);
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return ((i >> 6) & 0xF) == 0xF ? 0 : ret;
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}
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void fill(char *data)
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{
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static unsigned long i = 0;
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for (int j = 0; j < 4096; j++)
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{
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unsigned char sample = /*(voice_lead(i) >> 1) + */(voice_bass(i) >> 2) + (voice_arp(i) >> 2);
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data[j] = sample;
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i++;
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}
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}
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static const WAVEFORMATEX fmt = {
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WAVE_FORMAT_PCM, 1, 8000, 8000, 1, 8, 0
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};
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int main(int argc, char *argv[])
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{
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HWAVEOUT out;
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HRESULT rc = waveOutOpen(&out, WAVE_MAPPER, &fmt, NULL, NULL, CALLBACK_NULL);
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if (rc != MMSYSERR_NOERROR)
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{
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printf("error %d on open\n");
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exit(1);
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}
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WAVEHDR bufs[2] = {
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{ (char *)malloc(4096), 4096 },
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{ (char *)malloc(4096), 4096 },
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};
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int i = 0;
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fill(bufs[i].lpData);
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bufs[i].dwFlags = WHDR_PREPARED;
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waveOutPrepareHeader(out, bufs + i, sizeof(WAVEHDR));
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waveOutWrite(out, bufs + i, sizeof(WAVEHDR));
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i ^= 1;
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while (!(GetAsyncKeyState(VK_ESCAPE) & 1))
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{
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fill(bufs[i].lpData);
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bufs[i].dwFlags = WHDR_PREPARED;
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waveOutPrepareHeader(out, bufs + i, sizeof(WAVEHDR));
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waveOutWrite(out, bufs + i, sizeof(WAVEHDR));
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i ^= 1;
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while (waveOutUnprepareHeader(out, bufs + i, sizeof(WAVEHDR)) == WAVERR_STILLPLAYING);
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}
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} |